Sentences with phrase «varying covariate»

The following level 1 within - individual model was specified: log (cortisolti) = π0i + π1i (sample) + π2i (time) + eti, with log - transformed cortisol values as the dependent variable, π0i as the estimated intercept of cortisol at waking, π1i as the estimated slope of cortisol from waking to bedtime (with «sample» representing whether the sample was collected at waking [0] or bedtime [1]-RRB-, π2i as the regression coefficient representing the effect of the time - varying covariate (with «time» representing the sample collection time), and eti as the within - individual error.

We modelled age at risk as a time varying covariate, using Lexis expansion to stratify each participant into N observations, taking into account differing ages at risk over the follow - up period (14 - 16, 17 - 19, 20 - 22, 23 - 25, 26 - 27; Nmax = 5).

Discrete - time survival analysis with time - varying covariates was used to study the risk factors of lifetime suicide ideation, plans and attempts.

This model included the additional time - varying covariates (Level 1) representing (a) the effect of patient self - rated health on spouse depressive symptoms and (b) the effect of spouse self - rated health on patient depressive symptoms and the time - invariant effects (Level 2) representing (c) the effect of mean patient self - rated health on mean spouse depressive symptoms and (d) the effect of mean spouse self - rated health on mean patient depressive symptoms.

Single parenthood and public assistance were included as time - varying covariates.

To adjust family outcomes at each point for the three concurrent measures of the family environment, the model also included these factors as time - varying covariates.

For time - varying covariates, health declined over the 4 - year period from 2006 to 2010.

Not exact matches

Bullying behavior has been shown to vary with the child's race, age, and sex, 7,8,32 as has the amount and type of television viewing.35, 36 The association between bullying and socioeconomic status, including parental income and education, has not been explicitly explored, but socioeconomic status has been shown to be strongly associated with externalizing behavior generally.28 Socioeconomic status is also known to influence both television viewing and parenting style.22, 36 Model covariates therefore included the child's sex; race (Hispanic, African American, or non - Hispanic / non — African American); the child's age when the bullying question was asked in 2000; and the parents» income and educational levels.

Covariates were included if they differed statistically between the intervention and comparison groups at baseline or if inclusion in an analytic model caused point estimates of effect size to vary by more than 10 %.

Because parenting behaviors vary with family structure, 20 another family covariate of family type (1 - or 2 - parent home) was also included.

Thus, varying levels of child or adult responsibility for the drawings did not confound other effects tested in this study and did not need to be included as a covariate in further analyses.